Iivalvu zeglobhu, iivalvu zesango, iivalve zebhabhathane, iivalvu zokutshekisha, iivalve zebhola, njl.njl. zonke ngamacandelo olawulo ayimfuneko kwiinkqubo ezahlukeneyo zemibhobho. Ivalve nganye yahlukile ngenkangeleko, ubume kunye nokusetyenziswa okusebenzayo. Nangona kunjalo, ivalve yeglowubhu kunye nevalve yesango zinento efanayo ngenkangeleko, kwaye zombini zinomsebenzi wokusikwa kumbhobho, ngoko ke izihlobo ezininzi ezinonxibelelwano oluncinci nezivalo ziya kuzibhidanisa zombini. Ngapha koko, ukuba ujonga ngononophelo, umahluko phakathi kwevalve yeglowubhu kunye nevalve yesango mkhulu kakhulu.

1 Ulwakhiwo

Xa indawo yokufakela iyancipha, kufuneka ubeke ingqalelo ekukhethweni. Ivalve yesango inokuvalwa ngokuqinileyo kunye nomgangatho wokutywina ngoxinzelelo oluphakathi, ukuze kufezekiswe umphumo wokungavuzi. Xa uvula kwaye uvala,undoqo wevalve kunye nendawo yokutywina yesitulo sevalvezihlala zinxibelelana kwaye zikhuhla omnye komnye, ngoko ke indawo yokutywina kulula ukunxiba. Xa ivalve yesango isondele ekuvaleni, umahluko woxinzelelo phakathi komphambili nasemva kombhobho mkhulu kakhulu, nto leyo eyenza ukuba umphezulu wokutywina unxibe ngakumbi. Ukwakhiwa kwevalve yesango kuya kuba nzima ngakumbi kunevalve yeglowubhu. Ukusuka kwindawo yokujonga, phantsi komgangatho ofanayo, ivalve yesango iphezulu kunevalve yeglowubhu, kwaye ivalve yeglowubhu inde kunevalve yesango. Ukongezelela, i-valve yesango iphinda ihlulwe ibe yingcambu ekhulayo kunye nesiqu esifihliweyo. Ivalve yeglowubhu ayinayo.

2 Umgaqo wokusebenza

Xa i-valve yokumisa ivuliwe kwaye ivaliwe, luhlobo lwe-valve ye-valve ekhulayo, oko kukuthi, xa i-handwheel iguqulwa, i-handwheel iya kujikeleza kwaye iphakame kwaye iwe kunye ne-valve stem. I-valve yesango ijika i-handwheel ukwenza i-valve stem iphakame kwaye siwe, kwaye indawo ye-handwheel ngokwayo ihlala ingatshintshi. Izinga lokuhamba lihlukile. Ivalve yesango idinga ukuvula ngokupheleleyo okanye ukuvala ngokupheleleyo, ngelixa i-valve yokumisa ingenayo. Ivalve yokumisa ichaze indlela yokungena neyokuphuma; ivalve yesango ayinayo i-inlet kunye ne-outlet direction direction requirements.Ukongezelela, i-valve yesango ineendawo ezimbini kuphela: ukuvulwa ngokupheleleyo okanye ukuvala ngokupheleleyo. Isango lokuvula nokuvala i-stroke inkulu kwaye ixesha lokuvula nokuvala lide. I-valve plate movement stroke yevalve yokumisa incinci kakhulu, kwaye ipleyiti yevalve yevalve yokumisa inokumisa kwindawo ethile ngexesha lokuhamba kolawulo lokuhamba. Ivalve yesango ingasetyenziselwa kuphela ukusika kwaye ayinayo eminye imisebenzi.

3 Umahluko wokusebenza

Ivalve yokumisa ingasetyenziselwa ukusika zombinioff kunye nolawulo lokuhamba. Ukuxhathisa ulwelo lwevalve yokumisa kukhulu ngokuthelekiswa, kwaye kunzima kakhulu ukuvula nokuvala, kodwa ngenxa yokuba ipleyiti yevalvu imfutshane ukusuka kumphezulu wokutywina, i-stroke yokuvula kunye nokuvala kufutshane. Ngenxa yokuba ivalve yesango inokuvulwa ngokupheleleyo kwaye ivalwe ngokupheleleyo, xa ivulwe ngokupheleleyo, ukuchasana kokuhamba okuphakathi kumjelo womzimba wevalve kuphantse kube yi-0, ngoko ke ivalve yesango iya kusindisa kakhulu umsebenzi ukuvula nokuvala, kodwa isango. kukude kwindawo yokutywina, kwaye ixesha lokuvula kunye nokuvala lide.

4 Ufakelo kunye nendlela yokuhamba

I-valve yesango inefuthe elifanayo kumacala omabini, kwaye akukho mfuneko yeendlela zokungena kunye ne-outlet ngexesha lofakelo, kwaye i-medium inokuhamba kwiindlela zombini. Ivalve yokumisa kufuneka ifakwe ngokungqongqo kwicala lophawu lotolo kumzimba wevalvu. Kukho kwakhona ummiselo ocacileyo kwi-inlet kunye ne-outlet ye-valve yokumisa. Ivalve yelizwe lam “ezintathu-kwinye” imisela ukuba indlela yokuhamba kwevalve yokumisa isoloko isuka phezulu iye ezantsi.

I-valve yokumisa i-inlet ephantsi kunye ne-outlet ephezulu, kwaye ukusuka ngaphandle kuyacaca ukuba umbhobho awukho kumgca othe tye. Umjelo wevalvu yesango ukumgca othe tye ofanayo. I-stroke yevalve yesango inkulu kunaleyo yevalve yokumisa.

Ukususela kumbono wokumelana nokuhamba, i-valve yesango inokumelana nokuhamba okuncinci xa ivuliwe ngokupheleleyo, kwaye i-valve yokukhangela inokumelana nokuhamba okukhulu. I-coefficient yokumelana nokuhamba kwevalve yesango eqhelekileyo imalunga ne-0.08 ~ 0.12, amandla okuvula kunye nokuvala kuncinci, kwaye i-medium inokuhamba ngeendlela ezimbini. Ukumelana nokuhamba kweevalve eziqhelekileyo zokumisa ngama-3-5 amaxesha eevalve zesango. Xa uvula kwaye uvala, ukuvalwa ngokunyanzeliswa kuyafuneka ukuze kuphunyezwe ukutywinwa. Ingundoqo yevalve yevalve yokumisa inxibelelana nomphezulu wokutywina kuphela xa ivalwe ngokupheleleyo, ngoko ke ukunxiba kwendawo yokutywina kuncinci kakhulu. Ekubeni amandla ombane ohamba phambili mkhulu, i-valve yokumisa efuna i-actuator kufuneka ihlawule ingqalelo ukulungiswa kwendlela yokulawula i-torque.

Kukho iindlela ezimbini zokufakela ivalve yokumisa. Enye kukuba i-medium ingangena ukusuka ezantsi kwe-valve core. Inzuzo kukuba ukupakisha akukho phantsi koxinzelelo xa i-valve ivaliwe, enokwandisa ubomi benkonzo yokupakisha, kwaye ukupakisha kunokutshintshwa xa umbhobho ophambi kwevalve uphantsi koxinzelelo; into engalunganga kukuba i-torque yokuqhuba i-valve inkulu, malunga namaxesha angama-1 okuhamba ukusuka phezulu, kunye ne-axial force kwi-valve stem inkulu, kwaye i-valve stem kulula ukugoba. Ngoko ke, le ndlela ifanelekile kuphela kwiivalvu zokumisa ezincinci ezinobubanzi obuncinci (ngaphantsi kwe-DN50), kwaye i-valve yokumisa ngaphezu kwe-DN200 isebenzisa indlela ephakathi egeleza ukusuka phezulu. (Iivalvu zokumisa umbane ngokuqhelekileyo zisebenzisa indlela yokungena ukusuka phezulu.) Ukungalungi kwendlela yokungena ukusuka phezulu kuchasene ngqo nendlela yokungena ukusuka ezantsi.